Driving box



L. G. SAMPSON.

DRIVING BOX.

APPLICATION FILED NOV. 26. 1919.

Patented June 27, 1922.

WITNESS Part1! oi-Fics.

LESLIE G. SAMPSON, OF BROOKLYN, NEW YORK, ASSIGNOR lO FRANKLIN RAILWAY SUPPLY COMPANY, A CORPORATION OF DELAWARE.

DRIVING BOX.

ailer.

To all whom it may concern:

Be it known that I, LESLIE G. SAMPSON, a citizen of the United States, residin at Brooklyn, in the county of Kings and tate of New York, have invented certain new and useful Improvements in Driving'Boxes,

" of which the following is a specification.

This invention relates to driving boxes, and particularly to that form of box in which automatic compensating wedges are used, such as employed in locomotives, for example. l v

It is one of -the'primary objects of my invention to improve automatic wedges of the general character to which thisinvenr has been such as to make possible, unless of the driving box. i

more than usual care were employed, a too close adjustment of the springv tending tomove the compensating wedge with a force great enou h to jam it between the pedestal aw and t e driving box. It is the object of my invention to provide a compensating device, ,employing a spring, the construction of which will eliminate all possibility of too close air adjustment of the spring and thereby, prevent jamming of the wedge and 'I accomplish the foregoing and obtain the advantages herein set forth b means of a construction which I have illustrated in preferred form in'the accompanying drawinf s, wherein igure 1 is aside elevation and partial section of afldriving box illustrating the application of 'my improvements thereto; Figure 2 is a section on the line 2 of- Fi re "1; and Figures'3 and 4 are enlarged v1ews of details of the construction, ,1

Referring now to the drawing, the reference letter A i dicates the engine frame which is provided with'the usual pedestal vjaws 7 and 8' in which the driving box B is mounted for vertical play. Upon the pedestal faces of the driving box are the Specification of Letters Patent. Patented June 2'7,

Application filed November 26, 1919. Serial No. 340,858.

' rotation thereof.

This

driving box gibs 9, and interposed between the gib 9 on one side a'ndthe pedestal jaw 7,

are two wedge members 10 and 11 to provide an automatic compensating adjustment for the driving box in a manner that is well understood in this art. ,The means whereby the wedge 11 is yieldingly pressed home, and to which this nvention particularly relates, will nowbe described' The wedge bolt 12, connected to the lower end pedestal brace or binder 13 and projects through the lower portion of the yoke 14; which is bolted or fastened in any other suitable manner to the underside of the pedestal binder 13. Around thebolt is placed the spring 15-which seats at its lower end against the yoke 14 and which has its ilpper end fitted against the vertically movable cap 16 provided with the jaws 17 adapted to embrace one leg of the yoke 14 to prevent On the upper I face of I the cap 16, I provide a groove 18 into which the rib 19 of the adjusting nut 20 is adapted to fit.

This arrangement has two functions pri- 765 of the wedge 11, extends down through the ff marilyjin the first place when the rib fits I into the groove, the nut-is locked in position and cannot work up on the bolt 12 to" release the sprin tension; In the second place, it makes 1t impossible to compress the spring 15 solid, whichcontingency has heretofore frequently caused the wedge to become cramped on the frame and interfere with the free vertical movement of the driving box. Suppose the adjusting nut to have been turned down until the spring was compressed to solidor almost solid position. This would occur at some position of the rib across the groove 18 and not in it, and it will thus be seen that when the nut is turned so that the rib 19 does fit into the.

groove 18, the cap 16- can snap back under the pressure of the spring toward the nut 20. a distance equal to the' depth of the groove or approximately so, and will, therefore, release the spring from its solid or almost of the groove 18.

The device is exceedingly simple and ve efiicient in its operation, and evenwit solid position which had been reached with the rib 19 running cross wise the most careless adjustment-of the tension of the spring, it is impossible to leave the spring in solid or almost solid position,

prising a spring, a nut for adjusting the spring, and means for looking the adjusting nut, said means constructed to cooperate with the spring and the nut to insure springelasticity at all adjustments.

2. The combination with a frame and a driving box slidably mounted therein, of a wedge, and means for yieldingly pressing the wedge into engagement, said means comprising a bolt, a spring, a support for the spring, a cap member for the spring engag-- ing the support but movable with relation thereto, a nut on the bolt for adjusting the spring through the medium of the cap member, a groove in the cap, and a rib on the nut adapted to fit into said groove when they align.

3. The combination with a frame and a driving box slidably mounted therein, of a Wedge, and means for yieldingly pressing the wedge into engagement, said means comprising a bolt, a spring, a -support for the spring, a cap me mber for the spring, a nut on the bolt for adjusting the spring through the medium of the cap member, and interengaging means on the cap member and on cooperating with the support for engaging the spring, a nut on the bolt for ad usting the spring, and means cooperating with the spring, the support, and the cooperating means engaging the support for looking the nut and for insuring spring elasticity at all adjustments.

In testimony whereof, I have hereunto signed my name.

LESLIE G. SAMPSUN. 

